mirror of https://github.com/nocturn9x/nimd.git
Fixed config parsing module (sorta) and added example config file
This commit is contained in:
parent
d41e67f413
commit
76f2df1969
14
README.md
14
README.md
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@ -58,7 +58,6 @@ want to make sure your disks are mounted and that your network has been set up.
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```
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```
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[Service]
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[Service]
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name = ssh # The name of the service
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name = ssh # The name of the service
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description = Secure Shell Server # A short description
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description = Secure Shell Server # A short description
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type = simple # Other option: oneshot (i.e. runs only once, implies supervised=false)
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type = simple # Other option: oneshot (i.e. runs only once, implies supervised=false)
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@ -70,7 +69,6 @@ restartDelay = 10 # NimD will wait this many seconds before
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supervised = true # This is the default. Disable it if you don't need NimD to watch for it
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supervised = true # This is the default. Disable it if you don't need NimD to watch for it
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[Logging]
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[Logging]
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stderr = /var/log/sshd # Path of the stderr log for the service
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stderr = /var/log/sshd # Path of the stderr log for the service
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stdout = /var/log/sshd # Path of the stdout log for the service
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stdout = /var/log/sshd # Path of the stdout log for the service
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stdin = /dev/null # Path of the stdin fd for the service
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stdin = /dev/null # Path of the stdin fd for the service
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@ -99,20 +97,22 @@ INI-like structure), but the options are obviously different. An example config
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```
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```
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[Logging]
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[Logging]
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level = info # Levels are: trace, debug, info, warning, error, critical, fatal
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level = info # Levels are: trace, debug, info, warning, error, critical, fatal
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logFile = /var/log/nimd # Path to log file
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logFile = /var/log/nimd # Path to log file
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[Filesystem]
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[Filesystem]
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autoMount = true # Automatically parses /etc/fstab and mounts disks
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autoMount = true # Automatically parses /etc/fstab and mounts disks
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autoUnmount = true # Automatically parses /proc/mounts and unmounts everything on shutdown
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autoUnmount = true # Automatically parses /proc/mounts and unmounts everything on shutdown
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fstabPath = /etc/fstab # Path to your system's fstab (defaults to /etc/fstab)
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fstabPath = /etc/fstab # Path to your system's fstab (defaults to /etc/fstab)
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createDirs = /path/to/dir1, /path/to/dir2 # Creates these directories on boot. Empty to disable
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createDirs = "/path/to/dir:perms," # Creates these directories with the given permissions on boot. Empty to disable
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createSymlinks = /path/to/symlink:/path/to/dest, ... # Creates these symlinks on boot. Empty to disable
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createSymlinks = "/path/to/symlink:/path/to/dest," # Creates these symlinks on boot. Empty to disable
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[Misc]
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[Misc]
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controlSocket = /var/run/nimd.sock # Path to the Unix domain socket to create for IPC
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controlSocket = /var/run/nimd.sock # Path to the Unix domain socket to create for IPC
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setHostname = true # Set to true to set the machine's hostname automatically from /etc/hostname
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onDependencyConflict = skip # Other option: warn, error
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onDependencyConflict = skip # Other option: warn, error
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workers = 1 # Number of worker processes to use when spawning services
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restartDelay = 10 # Delay (seconds) that nimd will wait before restarting itself after crashes
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sigtermDelay = 90 # Delay (seconds) that nimd will wait before terminating child processes with
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# SIGKILL after sending a more gentle SIGTERM upon shutdown or exit
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```
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```
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10
config.nims
10
config.nims
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@ -1,12 +1,11 @@
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from macros import error
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from macros import error
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from ospaths import splitFile, `/`
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from os import splitFile, `/`
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# -d:musl
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# -d:musl
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when defined(musl):
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when defined(musl):
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var muslGccPath: string
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var muslGccPath: string
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echo " [-d:musl] Building a static binary using musl .."
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echo " [-d:musl] Building a static binary using musl .."
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muslGccPath = findExe("musl-gcc")
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muslGccPath = findExe("musl-gcc")
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# echo "debug: " & muslGccPath
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if muslGccPath == "":
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if muslGccPath == "":
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error("'musl-gcc' binary was not found in PATH.")
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error("'musl-gcc' binary was not found in PATH.")
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switch("gcc.exe", muslGccPath)
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switch("gcc.exe", muslGccPath)
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@ -15,7 +14,7 @@ when defined(musl):
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proc binOptimize(binFile: string) =
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proc binOptimize(binFile: string) =
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## Optimize size of the ``binFile`` binary.
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## Optimize size of the binFile binary.
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echo ""
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echo ""
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if findExe("strip") != "":
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if findExe("strip") != "":
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echo "Running 'strip -s' .."
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echo "Running 'strip -s' .."
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@ -36,11 +35,10 @@ task musl, "Builds an optimized static binary using musl":
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"\n Usage Example: nim musl FILE.nim.")
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"\n Usage Example: nim musl FILE.nim.")
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let
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let
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nimFile = paramStr(numParams) ## The nim file name *must* be the last.
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nimFile = paramStr(numParams) ## The nim file name *must* be the last
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(dirName, baseName, _) = splitFile(nimFile)
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(dirName, baseName, _) = splitFile(nimFile)
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binFile = dirName / baseName # Save the binary in the same dir as the nim file
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binFile = dirName / baseName # Save the binary in the same dir as the nim file
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nimArgs = "c -d:musl -d:release --opt:size " & nimFile
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nimArgs = "c -d:musl -d:release --opt:size --gc:orc" & nimFile
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# echo "[debug] nimFile = " & nimFile & ", binFile = " & binFile
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# Build binary
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# Build binary
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echo "\nRunning 'nim " & nimArgs & "' .."
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echo "\nRunning 'nim " & nimArgs & "' .."
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@ -0,0 +1,21 @@
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[Misc]
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controlSocket = /var/run/nimd.sock
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setHostname = true
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onDependencyConflict = skip
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workers = 1
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restartDelay = 10
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sigtermDelay = 90
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[Logging]
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level = info
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logFile = /var/log/nimd
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[Filesystem]
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autoMount = true
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autoUnmount = true
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fstabPath = /etc/fstab
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createDirs = "test:764,/dev/disk:123"
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createSymlinks = """/dev/fd:/proc/self/fd,/dev/fd/0:/proc/self/fd/0,/dev/fd/1:/proc/self/fd/1,/dev/fd/2:/proc/self/fd/2,
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/dev/std/in:/proc/self/fd/0,/dev/std/out:/proc/self/fd/1,/dev/std/err:/proc/self/fd/2,
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/dev/std/in:/,/dev/std/out:/does/not/exist,/dev/std/err:/proc/self/fd/2
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"""
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@ -16,18 +16,18 @@ import os
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import net
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import net
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import ../util/[logging, misc]
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import ../util/[logging, misc, config]
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import services
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import services
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import control
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import control
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import shutdown
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import shutdown
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proc mainLoop*(logger: Logger, workers: int = 1, startServices: bool = true) =
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proc mainLoop*(logger: Logger, config: NimDConfig, startServices: bool = true) =
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## NimD's main execution loop
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## NimD's main execution loop
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if startServices:
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if startServices:
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logger.info("Processing default runlevel")
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logger.info("Processing default runlevel")
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startServices(logger, workers=workers, level=Default)
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startServices(logger, workers=config.workers, level=Default)
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logger.debug(&"Unblocking signals")
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logger.debug(&"Unblocking signals")
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unblockSignals(logger)
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unblockSignals(logger)
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logger.info("System initialization complete, idling on control socket")
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logger.info("System initialization complete, idling on control socket")
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@ -68,7 +68,7 @@ proc mainLoop*(logger: Logger, workers: int = 1, startServices: bool = true) =
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discard
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discard
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clientSocket.close()
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clientSocket.close()
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except:
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except:
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logger.critical(&"A critical error has occurred while running, restarting the mainloop in 30 seconds! Error -> {getCurrentExceptionMsg()}")
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logger.critical(&"A critical error has occurred while running, restarting the mainloop in {config.restartDelay} seconds! Error -> {getCurrentExceptionMsg()}")
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sleepSeconds(30)
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sleepSeconds(config.restartDelay)
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# We *absolutely* cannot die
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# We *absolutely* cannot die
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mainLoop(logger, startServices=false)
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mainLoop(logger, config, startServices=false)
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@ -39,7 +39,12 @@ proc newShutdownHandler*(body: proc (logger: Logger, code: int)): ShutdownHandle
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var shutdownHandlers: seq[ShutdownHandler] = @[]
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var shutdownHandlers: seq[ShutdownHandler] = @[]
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var sigTermDelay: float = 10.0
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var sigTermDelay: float = 90
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proc setSigTermDelay*(delay: int = 90) =
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# Sets the sigtermDelay variable
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sigTermDelay = float(delay)
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proc addShutdownHandler*(handler: ShutdownHandler) =
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proc addShutdownHandler*(handler: ShutdownHandler) =
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@ -90,7 +95,7 @@ proc nimDExit*(logger: Logger, code: int, emerg: bool = true) =
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# We're in emergency mode: do not crash the kernel, spawn a shell and exit
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# We're in emergency mode: do not crash the kernel, spawn a shell and exit
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logger.fatal("NimD has entered emergency mode and cannot continue. You will be now (hopefully) dropped in a root shell: you're on your own. May the force be with you")
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logger.fatal("NimD has entered emergency mode and cannot continue. You will be now (hopefully) dropped in a root shell: you're on your own. May the force be with you")
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logger.info("Terminating child processes with SIGKILL")
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logger.info("Terminating child processes with SIGKILL")
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discard execCmd("/bin/sh") # TODO: Is this fine? maybe use execProcess
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discard execCmd(os.getEnv("SHELL", "/bin/sh")) # TODO: Is this fine? maybe use execProcess
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discard posix.kill(-1, SIGKILL)
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discard posix.kill(-1, SIGKILL)
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quit(-1)
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quit(-1)
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logger.warning("The system is shutting down")
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logger.warning("The system is shutting down")
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@ -113,7 +118,7 @@ proc nimDExit*(logger: Logger, code: int, emerg: bool = true) =
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if anyUserlandProcessLeft():
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if anyUserlandProcessLeft():
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logger.info("Terminating child processes with SIGKILL")
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logger.info("Terminating child processes with SIGKILL")
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discard posix.kill(-1, SIGKILL)
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discard posix.kill(-1, SIGKILL)
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logger.warning("Shutdown procedure complete, sending final termination signal")
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logger.warning("Shutdown procedure complete, NimD is exiting")
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proc reboot*(logger: Logger) =
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proc reboot*(logger: Logger) =
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29
src/main.nim
29
src/main.nim
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@ -17,7 +17,7 @@ import posix
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import os
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import os
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# NimD's own stuff
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# NimD's own stuff
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import util/[logging, constants, misc]
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import util/[logging, constants, misc, config]
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import core/[mainloop, fs, shutdown, services]
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import core/[mainloop, fs, shutdown, services]
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@ -40,8 +40,7 @@ proc addStuff =
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addSymlink(newSymlink(dest="/dev/std/in", source="/proc/self/fd/0")) # Should say link already exists
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addSymlink(newSymlink(dest="/dev/std/in", source="/proc/self/fd/0")) # Should say link already exists
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addDirectory(newDirectory("test", 764)) # Should create a directory
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addDirectory(newDirectory("test", 764)) # Should create a directory
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addDirectory(newDirectory("/dev/disk", 123)) # Should say directory already exists
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addDirectory(newDirectory("/dev/disk", 123)) # Should say directory already exists
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# Shutdown handler to unmount disks
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addShutdownHandler(newShutdownHandler(unmountAllDisks))
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# Adds test services
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# Adds test services
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var echoer = newService(name="echoer", description="prints owo", exec="/bin/echo owoooooooooo",
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var echoer = newService(name="echoer", description="prints owo", exec="/bin/echo owoooooooooo",
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runlevel=Boot, kind=Simple, workDir=getCurrentDir(),
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runlevel=Boot, kind=Simple, workDir=getCurrentDir(),
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proc main(logger: Logger, mountDisks: bool = true, fstab: string = "/etc/fstab", setHostname: bool = true, workerCount: int = 1) =
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proc main(logger: Logger, config: NimDConfig) =
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## NimD's entry point and setup
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## NimD's entry point and setup
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## function
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## function
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setStdIoUnbuffered() # Colors and output synchronization don't work otherwise
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logger.debug(&"Setting log file to '{config.logFile}'")
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setLogFile(file=config.logFile)
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logger.debug("Starting NimD: A minimal, self-contained, dependency-based Linux init system written in Nim")
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logger.debug("Starting NimD: A minimal, self-contained, dependency-based Linux init system written in Nim")
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logger.info(&"NimD version {NimdVersion.major}.{NimdVersion.minor}.{NimdVersion.patch} is starting up!")
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logger.info(&"NimD version {NimdVersion.major}.{NimdVersion.minor}.{NimdVersion.patch} is starting up!")
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logger.trace("Calling getCurrentProcessId()")
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logger.trace("Calling getCurrentProcessId()")
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@ -94,11 +94,15 @@ proc main(logger: Logger, mountDisks: bool = true, fstab: string = "/etc/fstab",
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# One of the key features of an init system is reaping child
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# One of the key features of an init system is reaping child
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# processes!
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# processes!
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reapProcess(getDefaultLogger())
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reapProcess(getDefaultLogger())
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if config.autoUnmount:
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logger.debug("Setting up shutdown handler for automatic disk unmounting")
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# Shutdown handler to unmount disks
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addShutdownHandler(newShutdownHandler(unmountAllDisks))
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addStuff()
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addStuff()
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try:
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try:
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if mountDisks:
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if config.autoMount:
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logger.info("Mounting filesystem")
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logger.info("Mounting filesystem")
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mountDisks(logger, fstab)
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mountDisks(logger, config.fstab)
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else:
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else:
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logger.info("Skipping disk mounting, assuming this has already been done")
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logger.info("Skipping disk mounting, assuming this has already been done")
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logger.info("Creating symlinks")
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logger.info("Creating symlinks")
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@ -111,7 +115,7 @@ proc main(logger: Logger, mountDisks: bool = true, fstab: string = "/etc/fstab",
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except:
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except:
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logger.fatal(&"A fatal error has occurred while preparing filesystem, booting cannot continue. Error -> {getCurrentExceptionMsg()}")
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logger.fatal(&"A fatal error has occurred while preparing filesystem, booting cannot continue. Error -> {getCurrentExceptionMsg()}")
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nimDExit(logger, 131, emerg=false)
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nimDExit(logger, 131, emerg=false)
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if setHostname:
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if config.setHostname:
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logger.info("Setting hostname")
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logger.info("Setting hostname")
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logger.debug(&"Hostname was set to '{misc.setHostname(logger)}'")
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logger.debug(&"Hostname was set to '{misc.setHostname(logger)}'")
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else:
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else:
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@ -119,9 +123,9 @@ proc main(logger: Logger, mountDisks: bool = true, fstab: string = "/etc/fstab",
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logger.debug("Entering critical fork() section: blocking signals")
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logger.debug("Entering critical fork() section: blocking signals")
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blockSignals(logger) # They are later unblocked in mainLoop
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blockSignals(logger) # They are later unblocked in mainLoop
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logger.info("Processing boot runlevel")
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logger.info("Processing boot runlevel")
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startServices(logger, workers=workerCount, level=Boot)
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startServices(logger, workers=config.workers, level=Boot)
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logger.debug("Starting main loop")
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logger.debug("Starting main loop")
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mainLoop(logger, workers=workerCount)
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mainLoop(logger, config)
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when isMainModule:
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when isMainModule:
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@ -167,9 +171,10 @@ when isMainModule:
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else:
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else:
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echo "Usage: nimd [options]"
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echo "Usage: nimd [options]"
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quit(EINVAL) # EINVAL - Invalid argument
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quit(EINVAL) # EINVAL - Invalid argument
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logger.debug("Calling NimD entry point")
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setStdIoUnbuffered() # Colors don't work otherwise!
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try:
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try:
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main(logger)
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main(logger, parseConfig(logger, "/etc/nimd/nimd.conf"))
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except:
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except:
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logger.fatal(&"A fatal unrecoverable error has occurred during startup and NimD cannot continue: {getCurrentExceptionMsg()}")
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logger.fatal(&"A fatal unrecoverable error has occurred during startup and NimD cannot continue: {getCurrentExceptionMsg()}")
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nimDExit(logger, 131) # ENOTRECOVERABLE - State not recoverable
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nimDExit(logger, 131) # ENOTRECOVERABLE - State not recoverable
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@ -18,37 +18,42 @@ import strutils
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import strformat
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import strformat
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import ../util/logging
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import logging
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import services
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import ../core/fs
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import fs
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type
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type
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NimDConfig* = ref object
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NimDConfig* = ref object
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## Configuration object
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## Configuration object
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logLevel*: LogLevel
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logLevel*: LogLevel
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logDir*: Directory
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logFile*: string
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services*: tuple[runlevel: RunLevel, services: seq[Service]]
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workers*: int
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directories*: seq[Directory]
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directories*: seq[Directory]
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symlinks*: seq[Symlink]
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symlinks*: seq[Symlink]
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filesystems*: seq[Filesystem]
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filesystems*: seq[Filesystem]
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restartDelay*: int
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restartDelay*: int
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sigtermDelay*: int
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autoMount*: bool
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autoMount*: bool
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autoUnmount*: bool
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autoUnmount*: bool
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fstab*: string
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fstab*: string
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sock*: string
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sock*: string
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onDependencyConflict*: string
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setHostname*: bool
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const defaultSections = ["Misc", "Logging", "Filesystem"]
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const defaultSections* = ["Misc", "Logging", "Filesystem"]
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const defaultConfig = {
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const defaultConfig* = {
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"Logging": {
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"Logging": {
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"stderr": "/var/log/nimd",
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"logFile": "/var/log/nimd",
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"stdout": "/var/log/nimd",
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"level": "info"
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"level": "info"
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}.toTable(),
|
}.toTable(),
|
||||||
"Misc": {
|
"Misc": {
|
||||||
"controlSocket": "/var/run/nimd.sock",
|
"controlSocket": "/var/run/nimd.sock",
|
||||||
"onDependencyConflict": "skip"
|
"onDependencyConflict": "skip",
|
||||||
|
"setHostname": "true",
|
||||||
|
"workers": "1",
|
||||||
|
"sigtermDelay": "90",
|
||||||
|
"restartDelay": "30"
|
||||||
}.toTable(),
|
}.toTable(),
|
||||||
"Filesystem": {
|
"Filesystem": {
|
||||||
"autoMount": "true",
|
"autoMount": "true",
|
||||||
|
@ -59,9 +64,16 @@ const defaultConfig = {
|
||||||
"virtualDisks": ""
|
"virtualDisks": ""
|
||||||
}.toTable()
|
}.toTable()
|
||||||
}.toTable()
|
}.toTable()
|
||||||
const levels = {"trace": Trace, "debug": Debug, "info": Info,
|
|
||||||
"warning": Warning, "error": Error, "critical": Critical,
|
const levels = {
|
||||||
"fatal": Fatal}.toTable()
|
"trace": Trace,
|
||||||
|
"debug": Debug,
|
||||||
|
"info": Info,
|
||||||
|
"warning": Warning,
|
||||||
|
"error": Error,
|
||||||
|
"critical": Critical,
|
||||||
|
"fatal": Fatal
|
||||||
|
}.toTable()
|
||||||
|
|
||||||
|
|
||||||
proc parseConfig*(logger: Logger, file: string = "/etc/nimd/nimd.conf"): NimDConfig =
|
proc parseConfig*(logger: Logger, file: string = "/etc/nimd/nimd.conf"): NimDConfig =
|
||||||
|
@ -89,16 +101,31 @@ proc parseConfig*(logger: Logger, file: string = "/etc/nimd/nimd.conf"): NimDCon
|
||||||
elif section notin defaultSections:
|
elif section notin defaultSections:
|
||||||
logger.warning(&"Unknown section '{section}' found in config file, skipping it")
|
logger.warning(&"Unknown section '{section}' found in config file, skipping it")
|
||||||
else:
|
else:
|
||||||
|
if not data.hasKey(section):
|
||||||
|
data[section] = newTable[string, string]()
|
||||||
for key in defaultConfig[section].keys():
|
for key in defaultConfig[section].keys():
|
||||||
data[section][key] = cfgObject.getSectionValue(section, key, defaultConfig[section][key])
|
data[section][key] = cfgObject.getSectionValue(section, key, defaultConfig[section][key])
|
||||||
for dirInfo in data["Filesystem"]["createDirs"].split(","):
|
for dirInfo in data["Filesystem"]["createDirs"].split(","):
|
||||||
temp = dirInfo.split(":")
|
temp = dirInfo.split(":")
|
||||||
directories.add(newDirectory(temp[0], uint64(parseInt(temp[1]))))
|
directories.add(newDirectory(temp[0].strip(), uint64(parseInt(temp[1].strip()))))
|
||||||
for symInfo in data["Filesystem"]["createSymlinks"].split(","):
|
for symInfo in data["Filesystem"]["createSymlinks"].split(","):
|
||||||
temp = symInfo.split(":")
|
temp = symInfo.split(":")
|
||||||
symlinks.add(newSymlink(temp[0], temp[1]))
|
symlinks.add(newSymlink(temp[0], temp[1]))
|
||||||
if data["Logging"]["level"] notin levels:
|
if data["Logging"]["level"] notin levels:
|
||||||
logger.warning(&"""Unknown logging level '{data["Logging"]["level"]}', defaulting to {defaultConfig["Logging"]["level"]}""")
|
logger.warning(&"""Unknown logging level '{data["Logging"]["level"]}', defaulting to '{defaultConfig["Logging"]["level"]}'""")
|
||||||
data["Logging"]["level"] = defaultConfig["Logging"]["level"]
|
data["Logging"]["level"] = defaultConfig["Logging"]["level"]
|
||||||
result = NimDConfig(logLevel: levels[data["Logging"]["level"]],
|
result = NimDConfig(logLevel: levels[data["Logging"]["level"]],
|
||||||
filesystems: filesystems)
|
logFile: data["Logging"]["logFile"],
|
||||||
|
filesystems: filesystems,
|
||||||
|
symlinks: symlinks,
|
||||||
|
directories: directories,
|
||||||
|
autoMount: parseBool(data["Filesystem"]["autoMount"].toLowerAscii()),
|
||||||
|
autoUnmount: parseBool(data["Filesystem"]["autoUnmount"].toLowerAscii()),
|
||||||
|
fstab: data["Filesystem"]["fstabPath"],
|
||||||
|
sock: data["Misc"]["controlSocket"],
|
||||||
|
onDependencyConflict: data["Misc"]["onDependencyConflict"].toLowerAscii(),
|
||||||
|
restartDelay: parseInt(data["Misc"]["restartDelay"]),
|
||||||
|
sigtermDelay: parseInt(data["Misc"]["sigtermDelay"]),
|
||||||
|
workers: parseInt(data["Misc"]["workers"]),
|
||||||
|
setHostname: parseBool(data["Misc"]["setHostname"])
|
||||||
|
)
|
|
@ -46,7 +46,13 @@ var defaultLevel = LogLevel.Info
|
||||||
var logFile = "/var/log/nimd"
|
var logFile = "/var/log/nimd"
|
||||||
var logToFileOnly: bool = false
|
var logToFileOnly: bool = false
|
||||||
|
|
||||||
## This mess is needed to make sure stderr writes are mostly atomic. Sort of
|
|
||||||
|
proc setLogFile*(file: string) =
|
||||||
|
# Sets the log file
|
||||||
|
logFile = file
|
||||||
|
|
||||||
|
|
||||||
|
## This mess is needed to make sure stderr writes are mostly atomic. Sort of.
|
||||||
## No error handling yet. Deal with it
|
## No error handling yet. Deal with it
|
||||||
var customStderrFd = dup(stderr.getFileHandle())
|
var customStderrFd = dup(stderr.getFileHandle())
|
||||||
discard dup3(stderr.getFileHandle(), customStderrFd, O_APPEND)
|
discard dup3(stderr.getFileHandle(), customStderrFd, O_APPEND)
|
||||||
|
|
Loading…
Reference in New Issue